Video explanation of blockchain

Video explanation of blockchain

Two years ago, the hack to get an investment in your startup was to shout: “We are using the Blockchain!” The Blockchain&nbsp;<a href="https://medium.com/@pavelkravchenko/decline-of-blockchain-hype-and-rise-of-a-common-sense-8de5789a794d" target="_blank">was</a>&nbsp;the magic term that nobody understood, but had the label of “the next big thing”. That is why investors were investing like mad into companies that said they are using it. If only one of those startups hit the jackpot, the investors would become (more) insanely rich.

Two years ago, the hack to get an investment in your startup was to shout: “We are using the Blockchain!” The Blockchain was the magic term that nobody understood, but had the label of “the next big thing”. That is why investors were investing like mad into companies that said they are using it. If only one of those startups hit the jackpot, the investors would become (more) insanely rich.


Did it prosper? Is it Alive?

Now two years later, we see big companies like ING executing pilots with Blockchain as a way to store contracts. Accenture and the United Nations have created a solution that will register the refugees of the world inside of a Blockchain.


I know almost nothing about the Blockchain technology and want to get some feeling about what is going on. For almost three years after the introduction of the Blockchain as a new technology in the bleeding edge tech startups, the registration of people, housing and companies were promised to be open via the Blockchain. But it is still not here. What is this Blockchain and will it really be a revolution?

No reading, here are some videos

Since a picture is worth a thousand words, here are a few videos that explain the complex technology in a way everybody can understand. I have selected these videos in such a way that you can watch them one-by-one and have a clear understanding at the end. There is some overlap between the videos but that will help getting a better understanding.


Understand the Blockchain in Two Minutes (IFTF 2m25)

This video by Institute for the Future (IFTF) is ClearFast and gives a great insight on what the Blockchain technology is.


https://www.youtube.com/watch?v=r43LhSUUGTQ


The real value of bitcoin and crypto currency technology — The Blockchain explained (DutchChain 6m15)

A bit dull :) but clear and helps to refine the message of the previous video. It only takes 6 minutes to watch. This video is created by the Dutchchainorganization.


https://www.youtube.com/watch?v=YIVAluSL9SU


Blockchain Technology Explained: What is a Blockchain? (PassKit 4m)

Pretty clear story by PassKit …..


https://www.youtube.com/watch?v=eXJHPDs4M3Y


How Bitcoin Works in 5 Minutes (Technical) (CuriousInventor 5m25)

In this video the part of voting in the network takes is explained. Voting is the essential part of the Blockchain that determines the legitimacy of the transactions in the Blockchain.


https://www.youtube.com/watch?v=l9jOJk30eQs


Blockchain definition

The definition of “blockchain” on Wikipedia is “a distributed database that is used to maintain a continuously growing list of records called blocks… By design, blockchains are inherently resistant to modification of the data.”


In its core, the database behind blockchain is a ledger containing all transaction records. The ledger is distributed, which means there isn’t a single central point where the records are saved. It provides a transparent way where transactions between two parties are verifiable and are stored permanently. Any transaction of ownership can be stored into the blockchain.

In case you have more time to read, you can check out this article on ITNEXT where the most frequently asked questions about Blockchain are answered by Ivo van der Nagel.

Another great read is this Blockchain for Dummies book, made by IBM. You can read it if you need more background information and better understanding after watching the videos and reading the article mentioned above.


Blockchain Summarized

In various videos and articles the Blockchain is summarized with the use of one of the following three set of characteristics (at least).

No consensus on key characteristics

I find this very interesting: In 2009, the Blockchain was implemented for the first time. This technology is still quite new that even on the key characteristics there is no consensus. The big question that pops up is: is this a big hype or just something so complex that not everybody understands it? And if this is only a big hype, why venture capitalists are investing millions in it. And why the United Nations is betting the lives of refugees on it?

Everybody seems to dream about a more peer-to-peer network for registration of valuables. It doesn’t really matter to people what the valuables are, it can be money, houses, documents, or identities. People dream about what would happen when they are not dependent on a governmental or financial organisation. Removing the red tape to increase the speed, reduce the cost of transactions, and create an opening for machine-to-machine transactions are the main ingredients in many Science Fiction stories.

And these dreamers ignore the complex center of the Blockchain technology. They ignore or do not know that it works only given specific rules or balance of rules. This is where I have my worries. For example: a consensus model on which transactions are valid, only works when the network is relatively big, otherwise someone with a big bot farm can take over the network.

And what does a blockchain add when there is no great incentive to create a big network of computers that want to build the blockchain?

What is your vision on Blockchain technology? Share your thoughts in the comments below!


Angular 9 Tutorial: Learn to Build a CRUD Angular App Quickly

What's new in Bootstrap 5 and when Bootstrap 5 release date?

Brave, Chrome, Firefox, Opera or Edge: Which is Better and Faster?

How to Build Progressive Web Apps (PWA) using Angular 9

What is new features in Javascript ES2020 ECMAScript 2020

Bitcoin and Blockchain Introduction Course

Learn Bitcoin and Blockchain — Quickly and Thoroughly — With this introductory course. Everything you need to get started using Bitcoin, blockchain, and distributed technology, without the fluff! Learn: currency, blockchain and distributed ledgers, peer-to-peer transfers, wallets, keys and addresses, hashing algorithms, binary and hex, difficulty, block speed, bitcoin mining, altcoins, and more!

What is in a block? - Blockchain

In my previous article, I tried to described the concept of a blockchain with code. This time, I'll try to describe the structure of a single block. I will use the Bitcoin blockchain to explain blocks, but keep in mind that the concepts will remain more or less the same. It could be useful to read my&nbsp;<a href="https://dev.to/damcosset/trying-to-understand-blockchain-by-making-one-ce4" target="_blank">last article</a>to understand a few things first.